Armored reenforced concrete slab



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June 9', 1931. a. E. NAGEL I ARMORED REENFQBCED CONCRETE SLAB Filed Aug. 3, 1929 2 Sheets-Sheet 2 Illlll-lll Patented .June' 9, 1931 GEORGE E. NAGEL, F COLUMBUS, OHIO nnnoimnnnnnroncnn CONCRETE SLAB i Application filed August 3, 192.9. SerialNo. 383,332.

This invention relates to an armored re,- cnforced concrete slab designed primarily for use in connectionwith railway crossings, but it is to be understood that a slab, in accord- .5 ance with this invention, may be employed for any purposes for which it is found applicable, and the invention has for its object to provide, in a manner as hereinafterset forth, a slab of the class referred to whereby the armor therefor is free of connection with the-reenforcing elements of the slab and further rigidly secured in position independent of such elements.

A-further object of the invention is to rovide, in a manneras hereinafter setfort 1,"aslab of the class referred to including an armor therefor set up from a split rectangular frame having its body of channel shape in vertical section, and with thearmor including new and' novel means for rigidly securing the split ends thereof together. 7 r

The invention further aims, to provide in a manner as hereinafter setforth, an armored reenforced concrete slab capable of being produced at a material decrease with respect to labor cost and cost ofmaterial and having its parts so arranged to provide a thoroughly finished product.

" Further objects of the invention are to provide, in a manner as hereinafter set forth, an armored reenforc'ed concrete slab which is comparatively simple in its construction and arrangement of parts, strong, durable, comf pact, thoroughly efficient in its use, readily as sembled, and comparatively inexpensive to manufacture.

' With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangementof parts as hereinafter more specifically described, and illustrated in theaccompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood thatchanges, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings, wherein like? reference characters denote corresponding parts throughout theseveral views:

t Figure 1 is a top plan view illustrating the armor, the anchoring means for the latter, and the longitudinally and transversely'extending reenforcements for the concrete body of the slab. I

Figure 2 is a transverse sectional view of an armored-reenforced concrete slab in accordance with this invention set up with respectto a rail filler and flangeway.

F igure 3 is a fragmentary view in vertical section of the armor and one of its anchoring means. 7 I

Figure 4: is a fragmentary view in perspective of one corner of the armor, and illustrating the means for connecting together the split ends of the rectangular frame which provides the armor.

Figure 5 is a fragmentary view, in sectional plan illustrating the means for connecting together the split ends of the rectangular frame which constitutes the armor.

Referringto the drawings, the body of the slab is'formed from concrete or any other suitable material and is indicated at 1. Embedded in the body 1 are transversely extending spaced vertically disposed, oppositely disposed metallic reenforcements in the form of truss members, indicated generally at 2, 3 and g 7 shown in Figure 2.-

Each truss member includes a pair of oppositely disposedparts 7 8 and a series of intermediate parts. The number of intermediate parts'depend on the length ofthe truss member. The intermediate parts are oppositely disposed with respect to the'top and bottom of the member. As shown by way of example,-the truss member is formed with three intermediate parts 9, 10 and 11, and with the part" 10'spaced from the parts 9 and ll. The part 10 is oppositely disposed with respect to the parts 9 and 11. Each end part has a squared outer side edge'12 and an inner side edge 13 inclining in opposite directions from the center thereof. Each end part furthermore has its outer end edge 14 inclining in opposite directions from its center thereby providing a point 15. The oppositely extending, inclined parts of edge 14 are arranged in parallelism with respect to the oppositely extending, inclined parts of the edge 13. I

Each intermediate part has its end edge 16 extending in opposite directions from the center thereof, and its outer end edge 17 also extending in opposite directions at an inclination from the center thereof thereby providing a point 18. The inclined portions of the outer end edge 17 are disposed substantially parallel to the inclined portions of the inner edge 16. The end part 7 is connected to the intermediate part 9 by an inclined arm 20 of a width less than the length of the part 7 and also with respect to the length of the part 9. The intermediate part 10 is connected to the part 9 by inclined arm 21 and the width of the latter is less than the length of the parts 9 or 10. The part 10 is connected to the part 11 by an inclined arm 22 and the width of the latter is less than the length of the parts 10 or 11. The end part 8 is connected to the part 11 by an arm 23 which is disposed at an inclination and thewidth thereof is less than the length of the parts 9 or 11.

The end part and the intermediate part are provided centrally thereof with a circular opening 24 for the passage of a tie bar to be presented referred to.

The end part 8 is constructed in the same manner as the end part 7, that is to say, is provided with a squared outer side edge 24, an inner end edge 25 extendin at opposite inclinations from the center thereof, and an outer end edge 26 extending at opposite inclinations from the center thereof, thereby providing a point 27. The inclined portions oft'he edges 26 are disposed substantially in parallelism with respect to the inclined portions of the edge 25.

The disposition of the inclined arms 20, 21, 22 and 23 with respect to the end and inte' mediate parts provides the truss member or reenforcement with alternately disposed, oppositely extending V-shaped parts or portions.

The length of the truss member preferably is slightly less than the width of the body portion 1 whereby the end parts thereof will be spaced adjacent the side edges of the body portion 1. I

The end parts and intermediate parts are larger than the inclined connecting arms to provide for uniform strength at the portions of the member through which extends the reenforcing bar to be presented referred to.

Embedded in the body portion 1 is an upper set of reenforcing bars 28 and a lower set of reenforcing bars 29. The bars are of less than the length of the body portion 1, and the bars of each set are arranged in spaced relation. The upper set of bars extend through the openings 24 arranged at the top of the truss members and the bars 29 extend through the openings 24 arranged at the bottom of the truss members. The truss members maintain the bars in spaced relation and each set of bars are tied together by the truss members. The truss members further support the bars in the position in which they are embedded in the body portion 1.

The body portion 1 has the lower longitudinal corners thereof beveled, as at 30. The upper part of each side and end face of the body portion 1 is inset in a manner as indicated at 31 in Figure 2. The inset part of the top of the body portion 1 is closed by a metallic armor, indicated generally at 32, and which has its outer face flush with the outer side and end faces of the body portion 1.

The armor 32 is formed from a frame corresponding in contour to the shape of the body portion 1 and is shown by way of example as of rectangular contour. The armor 32 includes a pair of side walls 33, 34, an end wall 35, an end wall 36 formed of two sections, and rounded corners 37, 38, 39 and 40. The corner 37 is integral with the side wall 33 and one of the sections of the end wall 36. The corner 38 is integral with the other section of the end wall 36 and with the side wall 34. The corner 39 is integral with the end wall and side wall 33, and the corner 40 integral with the end wall 35 and side wall Each of the walls of the armor is of channel shape in vertical section. See Figures 3 and 4. WVith reference to Figures 4 and 5 it discloses the sections 40 and 41 of the end wall 36. Section 41 in proximity to the free end has a countersunk portion 42 which provides a concavity 43. Section 40 is also formed with an opening 44 which communicates with the concavity 43. Section 41 is formed with an inset tongue having a semicircular part 45 to receive the countersunk part 42. The tongue which extends from section 41 is furthermore formed with a pair of lateral parts 46, 47 which abut the inner face of the section 40. The part 45 of section 41 is provided with an opening 48 which registers with opening 44. Seated in the concavity 43 and flush with the outer face of section 40 is the head 49 of a rivet 50, the latter extends through the registering openings 44, 48 and has its inner end upset as at 51, whereby the sections 40 and 41 are fixedly secured together. The tongue which extends from section 41 is indicated generally by the reference character 52, in Figure 4.

Each of the end walls 36 is formed with one or more countersunk portions, as illustrated with but one countersunk portion, is indicated at 53, and each side wall 33, 34, is formed with a series of spaced countersunk portions 54. The form of the'countersunk portions is illustrated in Figure 2 and each of said portions provides a concavity communicating with an opening 56. The concavities 55 are provided for receiving the heads 57 of anchoring members for the armor, and such anchoring members are generally indicated atf58, Figurej3. Each'anchoring member includes a head 57 and shank formed of an arcuate part 59, an angularly disposed part and a straight part 61 which is integral with'the head 57 centrally thereof. The part 61 is of lesslength than the part 6O.

The part 59 is arranged between the parts 60 and6-1.; The part '60 isdisposed at an angle with respect to the part 59 and also with re spect to the part 61. The part 59 provides a seat 62. The seat 62 of the anchoring element carried by the sides 33, 34' of the armor receives the outer end reenforcing bars of the upper setof bars28. The anchoringdevices orelements carried by the end walls extend at a point between the upper parts of the truss members and. in this connection see dotted line showing in Figure 2. .The armor 32 is flush withjthe upper face of the body portion 1. ,7 V a I V Figure 2 illustrates the securing of; the slab between a rail filler 63 and a flangeway 64. The rail filler and flangeway are constructed of creosoted wood and the connection between the slab and the elements 63 and 64 is had through the medium of dowels 65, which are anchored in the body portion 1 and elements 63 and 64. The corner portions 37, 38, 39 and 40 of the armor are not flanged. The flanges of the side walls 33 and 3% have their ends spaced from the ends of the flanges of the end walls 35, 36.

It is thought that the many advantages of a flanged armored, reenforced railway crossing V slab in accordance with this invention can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in. the details of construction can be had which fall within the scope of the invention as claimed.

What I claim is: 1. An armor for encompassing the concrete body of a crossing slab comprising a frame including a pair of s1de walls and a palr of end walls, each of said walls provided at its top and bottom with an inwardly extending, right angularly disposed flange between which said body extends, each flange being of a length less than the wall from which it extends whereby the ends of the flanges of the side walls willbe spaced from the ends of the flanges of the end walls to provide the corners of the frame free of flanges.

2. An armor for encompassing the concrete body of a crossing slab comprising a frame including a pair of side walls and a pair of end walls, each of said walls provided at its top and bottom with an inwardly extending, right angularly disposed flange between which said body extends, each flange being of a length less than the wall from which it extends whereby the ends of the flanges of the side walls will be spaced from the ends of the flanges of the end walls to provide the corners ofthe frame free of flanges,t he' corners of said frame being rounded.

3. An armor for encompasslng the concrete body of a crossing slab comprising a frame including apair of side wallsand a p air of end walls, each of said walls provided at its top and bottom with an inwardly extending,right angularly disposed flange between each of said walls being inset at one or more points toprovide one "or moreconcavities opening at the'outer face of the wall, the inner end of the wail of the concavity having an axial opening, said ,concalvities adapted to receive the heads of anchoring members for the armor and said openings providing for the 'passage of said members through the walls of the frame to be embedded in said body. V, v

' 4:. An armor for encompassingthe concrete body of a crossing slab coinprising a frame including a pair of sidewalls and a pair of end walls, each of said walls provided} at its top and bottomwith an inwardly extend ing, right angularly disposedflange between which said body extends, eachflange being of a length lessthan the wall from which it extends whereby the ends of'the flanges of the side walls will be spaced from the ends ofthe flanges of the end walls provides 'the corners of said frame free of flanges,the cor- .ners of said frame being rounded, eachof said walls vbeing inset at onelor morepoints to provide one or more concavities opening at the outer faceof the wall, the ,i nnerend of the wall ofthe .concavity having anf axial opening, said concavities adapted to receive the heads of anchoring members for the armor and said openings prov ding for the passage of said members through the Walls of the frame .to be embedded in said body.

5. An anchoring member fora concrete body armor in the form of a frame h'aving a wall thereof provided with 'aninset 'aart forming a concavity opening at the outer. face of the wall and with the inner end of the wall of the concavity having anopening, the com bination of a head for seating inf'said concavity, and a shank integral withjtlie head, ex:

tending through said. opening in the wall of the concavity, projecting inwardly from the wall of the armor and formed with'a pair-of parts angularly disposed with respect to each 7 other and an arcuate part, said arcuate part connecting the other twoparts together, one

ofsaid parts disposed in angular relationwith respectto the otherpart and beingof greater length than such other part, the part of shorter length being integral with said head. 6. An anchoring member. fora concrete body armor in the form of a frame having a wall thereof provided with an inset part forming a concavity opening at the outer face of the wall and with the inner end of the wall of the concavity having an opening, the combination of a head for seating in said concavity, and a shank integral with the head, extending through said opening in the wall of the concavity, projecting inwardly from the wall of the armor and formed with a pair of parts angularly disposed with respect to each other and an arcuate part, said arcuate part connecting the other two parts together, one of said parts disposed in angular relation with respect to the other part and being of greater length than such other part, the part of shorter len th being integral with said head, said shank ing square in cross section.

7. An armor for encompassing the concrete body of a crossing slab comprising a frame having its top and bottom provided with inwardly extending flanges between which said concrete body extends, said frame having a plurality of spaced inset portions of semi-circular contour to provide a plurality of semi-circular concavities opening at the outer face of the wall, the wall of each concavit having an axial opening at its inner end or the passage therethrough of an inwardly extending anchoring member for said frame and said concavities providing for receiving the heads of the inwardly extending anchoring members for connecting the latter to the frame.

8. An anchoring member for a concrete body armor in the form of a frame having a semi-circular concavity opening at the outer face of the frame and with the wall of the concavity at its inner end formed with an opening, the combination of a semi-spherical head for seating in'said concavity, a shank integral with the head, extending through said opening and projecting inwardly from the frame, said shank provided intermediate its ends with an arcuate portion, said shank including a pair of parts disposed at an angle with respect to each other, one of said parts I being of less length than the other and integral with the head, said arcuate portion connecting said parts together.

9. An anchoring member for a concrete body armor in the form of a frame having a semi-circular concavity opening at the outer face of the frame and with the wall of the concavity at its inner end formed with an opening, the combination of a semi-spherical head for seating in said concavity, a shank integral with the head, extending through said opening and projecting inwardly from the frame, said shank provided intermediate its ends with an arcuate portion, said shank including a pair of parts disposed at an angle with re spect to each other, one of said parts being of less len th than the other and integral with the head, said arcuate portion connecting said parts together, said shank being square in cross section at any point throughout its length.

10. A metallic armor adapted to surround the concrete body of a crossing slab at the upper part of the latter, said armor comprising a frame formed with inwardly extending flanges at the top and bottom thereof, said frame between said flanges provided with a plurality of spaced, inwardly extending parts providing concavities to receive the heads of and connecting inwardly extending anchors for the armor to the latter, and each of said inwardly extending parts provided at its inner end with an opening communicating with a concavity to provide for the passage of the shank of the anchoring member therethrough into the frame, said concavities opening at the outer face of the frame.

In testimony whereof, I affix my signature hereto. 7

GEORGE E. NAGEL. 

